Communications of the ACM
vic: a flexible framework for packet video
Proceedings of the third ACM international conference on Multimedia
Beating the limitations of camera-monitor mediated telepresence with extra eyes
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
CU-SeeMe VR immersive desktop teleconferencing
MULTIMEDIA '96 Proceedings of the fourth ACM international conference on Multimedia
Proceedings of the 25th annual conference on Computer graphics and interactive techniques
Multi-projector displays using camera-based registration
VIS '99 Proceedings of the conference on Visualization '99: celebrating ten years
Catadioptric Omnidirectional Camera
CVPR '97 Proceedings of the 1997 Conference on Computer Vision and Pattern Recognition (CVPR '97)
Toward a compelling sensation of telepresence: demonstrating a portal to a distant (static) office
Proceedings of the conference on Visualization '00
PixelFlex: a reconfigurable multi-projector display system
Proceedings of the conference on Visualization '01
AutomaticKeystone Correction for Camera-Assisted Presentation Interfaces
ICMI '00 Proceedings of the Third International Conference on Advances in Multimodal Interfaces
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Current camera-monitor teleconferencing applications produce unrealistic imagery and break any sense of presence for the participants. Other capture/display technologies can be used to provide more compelling teleconferencing. However, complex geometries in capture/display systems make producing geometrically correct imagery difficult. It is usually impractical to detect, model and compensate for all effects introduced by the capture/display system. Most applications simply ignore these issues and rely on the user acceptance of the camera-monitor paradigm.This paper presents a new and simple technique for producing geometrically correct imagery for teleconferencing environments. The necessary image transformations are derived by finding a mapping between a capture and display device for a fixed viewer location. The capture/display relationship is computed directly in device coordinates and completely avoids the need for any intermediate, complex representations of screen geometry, capture and display distortions, and viewer location. We describe our approach and demonstrate it via several prototype implementations that operate in real-time and provide a substantially more compelling sense of presence than the standard teleconferencing paradigm.